Governor for gas-engine valve-gears.



M. 0. REEVES. -G0 VBRNOR FOR GAS ENGINE VALVE GEARS.

APPLIOATION FILED MAR.11, 1912.

Patented Dec. 17, 1912.

MILTON O. REEVES, F COLUMBUS, INDIANA.

GOVERNOR FOR GAS-ENGINE VALVE-GEARS.

Specification of Letters Patent.

. Patented Dec. 1?, 1212.

Application filed March 11, 1912. Serial No. 683,138.

T 0 all whom it may concern:

Be it known that I, MILTON O. Bnnvnga citizen of the United States,reslding at Columbus, in the county of Bartholomew and State of Indiana,have invented a new and useful Governor for Gas-Engine Valve- Gears, ofwhich the following is a' spec1- I fication.

The object of my invention is to produce a simple device by means ofwhich the governing speed of an internal combustion engine may bereadily varied, the primary object of my invention being to provide anapparatus which is readily understandable and operable by persons whoare not skilled shaft of an internal combustion engine provided with agear 11 which meshes with a gear 12 carrying the usual valve-operatingcam 13, said operatingcam acting in the usual manner upon a roller 14carried by a reciprocable valve stem 15 which engages a valve-operatinglever 17. Stem 15 is provided with a catch block 18, of usual formarranged to be engaged by a retaining finger for limited periods of timein such position as to hold the exhaust valve 19 open irre spective ofthe rotation'of cam,13.

Geared to gear 12 is a pinion 21 which is attached to a sleeve'22journaled in a bearing 23. The sleeve 22 carries two pairs of jected.Lever 28is held in engagement with oppositely arranged arms 24, 24 toeach pair of which ispivoted a governor ball 25, the inner arms 26 ofwhich rest upon the end of a pin 27 which passes axially through sleeve22 and engages at its pro ected end with one arm of a lever 28 pivotedat 29 upon a bracket 31 carried by the stationary bearing 32 throughwhich the valve rod 15 is propin 27 by means of a spring 33, and thegovernor balls are normally drawn together 7 by one or more springs 34.To this extent my apparatus is of a common form.

Spring 33 operates upon lever 28 sons to hold it in engagement with pin27 no matter what the position of that pin may be, and the governingspeed of the governor balls 25 might be varied by an adjustment of thisspring 33 upon lever 28, but I have found in practice that an attempt tovary the speed of the engine by such an adjustment is not desirablebecause it varies the amount of wear of pin 27 upon lever 28 and, asthis particular device isdesigned primarily for use'upon very cheapengines, lever 28 is commonly made of cast iron and incapable ofwithstanding great wearing pressures. I therefore plan that theresistance of lever 28 to movement caused by axial projection of pin 27shall be very light and uniform but,

,as the springs 33 gradually deteriorate in strength, it is essentialthat an adjustable abutment screw 35 be provided for this spring so asto compensate for this gradual weakening of spring 33.

It has heretofore been common to so form the end of the lever 28 as tocooperate with the catch block 18 of rod 15 but such con st'ruction isopen to a number of objections and it is to overcome these objectionsthatmy present construction has been provided. I axially extend the hubof lever 28, as shown in Fig. 2, and provide this extended hub with aflat seat 41 upon which I secure a spring finger 42, said spring beingprovided with two: slots 43 through which the fastening screws 44 arepassed, The length- Wise position of the spring finger 42 may beaccurately determined by means of a temper screw 45 carried by lever 28and bearing againstthe rear end of the finger. The forward end of lever28 is turned to one side, as indicated in Fig. 2, so as to overlie thefree end of finger 42, and projected through this overlying portion oflever 28 is an. adjusting screw 46 which is provided with a hand wheel47. The adjusting screw 46 engages the free end of finger 42 and thusloo determines the position of this finger, relative to the stop block18, transversely of the line of movement of the stop block, and thusincreases or diminishes the necessary travel of the finger before it canbe projected into the line of movement of the stop block by the actionof the governor, this being done without aifecting in any manner thesprings which fundamentally control the speed operation of the governor.The finger 42 is made of spring metal, and, "as it is comparativelylight, a very high grade of material may be used without materiallyincreasing the expense of the structure as a whole.

By this construction, very great accuracy of governing can be attained,without any material increase in cost of production. The

a thin diametrical web or finger 52 which.

lies between the adjacent arms 26 of the two governing balls and isthusheld by said arms against rotation.

In the smaller sizes the spring 42 may be .too short'to permit readyadjustment and in that case I provide the construction shown iii Fig. 4,in which a short tube or sleeve 61 is journaled upon pin 29. Journaledupon tube 61 is an arm 28 corresponding with arm 28 and provided with acorresponding adjusting screw 46. The

- finger 42, instead of being a spring finger like finger 42, is, arigid finger journaled upon sleeve 61 and connected to arm 28 by a coilspring which continually holds the finger 42 in engagement with theadjusting screw 46'.

I claim as my invention:

1. The combination of a reciprocable valve rod, means for reciprocatingsaid rod, a speed controlled governor, a lever acted upon by a member ofsaid speed controlled governor, a stop block carried by the reciprocablevalve rod, a spring finger carried by said lever and adapted tocooperate with said stop block, and an adjusting screw carried by saidlever and forming an adjustable abutment for the free end of said springfinger, whereby it may be adjusted toward and from the line of travel ofthe stop block, all combined and arranged substantially as and for thepurpose set forth.

2. The combination of a reciprocable valve rod, means for reciprocatingsaid rod, a stop block carried by said rod, a rotary governor sleeve, apair of governor balls pivoted upon said sleeve upon axes substantiallyat right angles to the axis of rotation of the sleeve, a pinprojectedthrough the sleeve and axially movable therein, said sleeve having apair of notches formed in one end flanking an intermediate dia .saidlever to hold it in engagement with the governor pin, a spring fingercarried by said lever, means by which said spring finger may be adjustedlengthwise upon said lever, and an adjusting screw carried by said leverand engaging the free end of said spring finger to adjust the sametoward and from the line of movement of the stop block, all combined andarranged substantially as and for the purpose set forth.

3. The combination of a reciprocable valve rod, means for reciprocatingsaid rod, a stop block carried by said rod, a rotary governor sleeve, apair of governor balls pivoted upon said sleeve upon axes substantiallyat right angles to the axis of rotation of the sleeve, a pin projectedthrough the sleeve and axially movable therein, said sleeve having apair of notches formed in one end flanking an intermediate diametricalfinger, the adjacent arms of the governor balls resting in said notches,a lever arranged adjacent the valve rod and having one end in engagementwith one end of the governor pin, a spring acting upon said lever tohold it in engagement with the governor pin, a spring finger carried bysaid lever, and an adjusting screw carried by said lever and engagingthe free end of said spring finger to adjust the same toward and fromthe line of movement of the stop block, all combined and arrangedsubstantially as and for the purpose set forth.

In witness whereof, I have hereunto set my hand and seal atIndianapolis, Indiana, this 6th day of March. Y

MILTON o. REEVES. [1 8.

Witnesses: ARTHUR M. HooD, FRANK A. FAHLE.

